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_extensions/dfolio/ieee/partials/mathjax.html

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+<!-- This is what works with Quarto -->
+<script>
+  MathJax = {
+    loader: {load: ['[tex]/mhchem', '[tex]/physics']},
+    tex: {
+      tags: 'ams',  // should be 'ams', 'none', or 'all'
+      packages: {'[+]': ['mhchem','physics']}
+    }
+  };
+</script>